The two levers on the forward part of the transmission are for regular column shift 3 speed linkage. The open driveline configuration indicates the transmission fits 1955-up cars and/or trucks. Most of those were used in cars- - - -I'm not sure if any trucks came equipped with the overdrive or not. The shift lever on the tailshaft housing is a lockout device to keep the OD from engaging by pulling a cable for such things as trailer towing or using compression braking on a long downhill grade, etc. Check your private messages- - - -I might be headed to E. KY near the W. VA border on business in a few days.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!